Damper for boilers.



waited Feb. 15 1,916.

3 2 SHEETS-SHEET 2- Altoona',` inthecounty of Blairand yState clear; andfexact description et matter `oil `this application relates to a flow fot furnace gases among the superheater g elements `Wheneveri` the `flow ci' steam through saidgelements is shut; olf. l

`tratesa longitudinal-section 'of a portion of `the beller and smokebox. Fig.; 2 1s a vcentral section of theautomatie damper mechanism,

- and gwnisin'takenon the "line 3-3 of Fig. `2.

In `detail the reference number desigfnates the yi'oinvard `portion of a locomotive other boiler of the fire tube type suitably ycoxniected.tothesmoke box 1 1 and provided providedwith ai pluralityl of `fire `tubes heater coils I4. asywill Abe understood. The j {inlet ends ci. these elements are connected gqtdthe satnratedrsteamcompartment y15j and *1.* the `outlet lendsl to the superheated steam ,compartment 1G? of the cylindrical 'or drum yhealder. 17. Thesteam is conducted from 5f. the `boilertothesaturated steam compartment `byfmeans ot the pipe 18 and the superheated steam is 'conducted from the `:fthe pipe 19.` During the periods Whenthe i thrttle, islclosed there is no fiowfof steamV through the "superhealting-coilsand-the lat- Hter` would `be subjected to ruinous destruction by `the intense heat passing through the 'enlarged providedfato shutoff the iioiv oi gases j-. through the` latter.` I am aware that this idea of shuttingoiitheliow of furnace gases l through saidfenlarged tubes attliose periods is broadlyfoldfMyinvention therefore resides `ininiprtned` means for automatically yaccent;)lishingg` this @function The allow of c gasesfjthrough'ythe "en-large'd tubes `is j preilvented 4and the ainpejr :22.*

. extend, substantiallynacross the smoke box as\yWillalsorhelunderstood.` The damper is ,ispeqcation of Letters atent.

citizen of theUmted States, residing at ofrPfennsylvania, hai/'e invented certain new l anduseful Improvements 1n 'Dampers' for` Boilers, otvvhicli the..following 1s a full,

vith theusual tube `slieet, 12. The boiler is *suiliciently enlargedqto" receive the super` compartment 16 tothe `engine by means of ubes 1 8 if some. means were `not f `byineansoffgthe baflles'20 and A21 'lhe baffles 20 and 21 if 1j"1nolmtejd.to"rptateabout.the axisoip4 shaft DAMPER son Bonnes.

lor journal 23' and` villen in the full line position shown in Fig. lit acts in conjunction with the baffles 20 Yand 21 and with the strips 2l-see Fig. 3; only one shown-to shut oli' the flow of gases through the enlarged `iire tubes. The ends of the journal 23 is mounted to rotate `in suitable hearings 25, only one being shown. The other journal for the damper is not illustrated. Upon Patented ret. i5, i916. j x Appncanorr med January 1c, 1915. serial No. 2,542.

one end of sha-jt 23 is lixedly secured an. arm` 26 the outer end of `which is provided with aA counterweight 27. Secured to the `bracket .28, upon which one oi the journals 25 is secured, is a damper cylinder 29 'through which the arm 26 projects. This cylinder is provided with a` piston 30 which reciprocates inthe enlarged portion 31 ot the cylin der 29 and 'which is connected to a slotted stem 32 which snugly tits the reduced-portion of the cylinder. The arm 26 also projects through the slot of the stem 82 and normally rests upon the antifriction roller 33. The lower end of thc'd-.unper cylinder is connected by, a pipe 34k to the valve chest 35.

When the throttle valve closed, and the steam therefor shut oli 'from the engine, the parts will be in the position shown in full lines in Fig. 1. lhen the throttle is opened ,steam will be admitted tl'irough the pipe 34 `to the lower side of the piston 30 forcing the' same. upwardly thereby oscillating the arm 2 6 and the shaft 23 to open the damper 22. As soon as the throttle valve is closed the piston will be forced tonormal position by means of gravity of the counterweighted arm 26 and the damper lclosed. This damperwill shut oft the flow of furnace lgases through the enlarged tubes and preventthe heat from otherwise injuring the superheater elements located therein. l

From the above description it Will be seen that the automatic control is reduced to the simplest form and to the minimum number of parts.

What I claim is: l 1. The combination With a steam boiler having lire tubes and a superheater located in said lire tubes, of an oscillatory damper "journaled in the smoke box of said boiler and adapted to control the flow of gases 'llheoperation of the device is as followsz through said fire tubes, meehanismopernted Y by means of fluid pressure yfromthelocnno- 'tive and adapted to close said damper .when

` the flow of steam tothe superheater lis out y'ting Hurd to and"disohargngY thesamiejfrom l, havingro tubes anda superheaterilooatd and provided withl a shaft about`-whioh it is n in sad .fire tubes, of, `a vdamper controlling;

the flow of gases through ysaidl [lire tubes vadapted to be osollated, and nie'gns'vforiclosf when the-flow Steam oom r sing aficounter-Weighted?oscillatoryf besfand a superheater located .I of damper" for controlling fow asesiroln sad'fre tubesysaid damper b gprovidedy with a'shaft 'about'l is adapted to beosoilllated,r and .means "for v animating saidj damper adapted "to CIQSe'saddarnper Whenf'th'eflow of steam .is Y cutoff and ozopen vthe sainovhen the steam urne y wehte farm normallyfaotingby gravity to reotlyyconnectedto said counter-weighted cylinder4 to ac tuate said' n iember.

in Said'jre tubes, of a. damper'controllng the owofgases from said fire tubes,v saidr damper beingprovdedwith a shaft about Aand toi fing thesame from saidv cylhdr'to reciprosdlylsecur'edto-the'saidsliaftf ud-fcat'ethe member-therein-and oscillatefthe damper.

- in said fire 'tubes' of a damper controlling pressure f v mechanism "to recipron on, n comprisingf a; ckmnter-l of said buter-weight, antifriction means' I interposed between the ,f reciprocating mem-- y I i Y ber,--and the," counter-Weighted arm, and

meansfor admitting .tluid'to` and diseharg-k l Aeo rnb-inationwitlv1-yg'1, steam boiler having'rejtubes and-a superheater located 45L `The 65 the 110W of gases through said re tubes. and provided with' a shaft about Whlch 1t 1s l adapted tobe'oscillated, and means for clos-v in-g said-damper when the flow of steam through said superheater' is shut oand to open.t he"`s`arne when the How through the super-heater is turned on, comprlslngacyllnf der provided with a slot extending through the wall thereof ,-a piston andy a piston stemv movable in said ylnder, an arm lixedly sev'cured to the said damper shaft, saidvarm projecting through said slotin the cylinder, and engaging with said piston stem, and nieans for.; admitting' fluid to and discharging uidwfrom said cylinder to'reclprocate said piston and stem to oscillate thedamper. In testlnony'whereof I affix my signature in the presence of two subscribing. Witnesses.

CHARLES D. YOUNG. y

Witnesses: r

S. E. GEARHART, Ocr'ro B. FURRER. 

